Powerware 9 - Manual (Page 47)

UPS Operation
41 Powerware ® 9 Prestige Series User’s Guide (600 VA - 1800 VA)
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Using Maintenance Bypass
Use the following procedure to transfer the critical load to Maintenance
Bypass (AC Line operation) and remove the UPS:
1. Disconnect the DB-25 serial communications cable from the
serial port on the UPS rear panel.
2. Toggle the Bypass switch on the PowerPass to the BYPASS
position (see Figure 13 or Figure 14). The PowerPass is now
powering your equipment from utility power.
3. Press and hold the Output Off button until the long beep
ceases (approximately three seconds). The

indicator
remains lit.
4. Switch the circuit breaker on all battery cabinets to the
OFF (O) position.
5. Disconnect the battery connector on the UPS rear panel.
6. Using a #2-Phillips screwdriver, loosen the PowerPass
mounting screw until it is free (the screw remains captive).
7. Remove the PowerPass from the UPS, being careful not to
loosen the power cords plugged into the PowerPass.
Laser Printer
UPS Load PowerPass
Utility Power
Figure 12. PowerPass Block Diagram (AC Line Operation)